Av vs Tv

[jads]

Hey there,

am new to these boards and had a question regarding aperture and shutter priority shooting.

I was out in the park today with a friends SLR. I had 100asa in it, although it was sunny\cloudy conditions and the trees were making things a little gloomier than they should have been.

I put the 28-200mm telephoto on and exprimented with a number of av settings, with the av priority set. The problem I was getting was that if I tried to set a depth of field anywhere between 6 and 13, the calculated shutter speed would fall far too low? i.e. 1\4 , 1\10, 1\15 etc... too low for handheld shooting of course. Reversing the exercise, using shutter priority, ( 80, 125, 250 etc) I was getting the aperture setting flashing at 4.5 all the time.

Is my ultimate problem simply that it was too gloomy, or is there something I'm missing here? I obviously want to avoid camera shake, so prefer to set a higher s\speed and risk exposure problems or incorrect focusing etc.. How can you get a decent handheld s\peed but have a bit more flexibility with aperture - I guess mannual setting might be the way to go??

cheers for any advice..

[FlipsidE]

I'm curious. What's the maximum aperture range on that lens?

FlipsidE

[jads]

not sure if this sounds right, but the lense has 28-200mm 1:3.8 -5.6 written on it.

It will only seem to open up to 4.5

[robertwgross]

Hey there,

am new to these boards and had a question regarding aperture and shutter priority shooting.

I was out in the park today with a friends SLR. I had 100asa in it, although it was sunny\cloudy conditions and the trees were making things a little gloomier than they should have been.

I put the 28-200mm telephoto on and exprimented with a number of av settings, with the av priority set. The problem I was getting was that if I tried to set a depth of field anywhere between 6 and 13, the calculated shutter speed would fall far too low? i.e. 1\4 , 1\10, 1\15 etc... too low for handheld shooting of course. Reversing the exercise, using shutter priority, ( 80, 125, 250 etc) I was getting the aperture setting flashing at 4.5 all the time.

Is my ultimate problem simply that it was too gloomy, or is there something I'm missing here? I obviously want to avoid camera shake, so prefer to set a higher s\speed and risk exposure problems or incorrect focusing etc.. How can you get a decent handheld s\peed but have a bit more flexibility with aperture - I guess mannual setting might be the way to go??

cheers for any advice..

First of all, the Canon version of that 28-200mm lens you mention is f/3.5 to f/5.6, and it will work that way. Second, what do you mean by "if I tried to set a depth of field anywhere between 6 and 13". Do you refer to a distance in meters or feet or something else? If your calculated shutter speeds look too low to use handheld, then go to a tripod.

---Bob Gross---

[FlipsidE]

The 3.8-5.6 sounds like the maximum aperture range for the lens. That means that at the minimum focal length, the maximum aperture is 3.8. At the maximum focal length, the maximum aperture is 5.6. If you are somewhere in between those two focal lengths, then a maximum aperture of 4.5 is to be expected.

Does that make sense? I hope that helps.

FlipsidE

[jads]

thanks guys. I'm quite new to all this so I might be confusing everyone - as well as myself :roll:

My approach was to try and set a stop of say, f 8.0, then everything in frame would be roughly in focus? Perhaps I'm not using the right technical approach to setting up shots? As I'm a rank amateur, I thought that using a "priority" setup might be the easiest place to start.

Obviously, as you say Bob, the light was just too gloomy to take handheld shots and a tripod was required.

Looking forward to a Digital with adjustable ISO ....

thanks again.